The requirements for nonattainment NSR for the ozone NAAQS are located in § 51.165 . For each nonattainment area, the state shall submit a nonattainment NSR plan or plan revision for the 2008 ozone NAAQS no later than 36 months after the effective date of the area's designation for the 2008 ozone NAAQS.
40 C.F.R. §51.1114